Quarryville, PA 17536 Frost Dates
Quarryville, PA: when does the frost end?
Typically, the last spring freeze lands around 04/03, roughly 218 days out. Fall's first freeze usually shows up around 11/06, roughly 217 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Quarryville, not a forecast for this year.
Stretching the season past the first frost
With roughly 10 weeks until Quarryville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Quarryville against the rest of the dataset
About 217 days separate Quarryville's last and first frost, putting it 13,493 of 40,283 ZIP codes nationally. Within PA, it ranks 48 of 2,088.
Learn more
Before leaning on 17536's figures: local microclimates explains what one yard in Quarryville can differ from the 17536 normal, while zone vs. frost date explains why Zone 7a and Quarryville's frost date answer different questions.